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United States Patent | 6,154,167 |
Annan ,   et al. | November 28, 2000 |
A novel method of creating and detecting ultra wide bandwidth signals in a ground penetrating radar context.
Inventors: | Annan; Alexander Peter (Mississauga, CA); Leggatt; Charles David (Toronto, CA) |
Assignee: | Sensors & Software Inc. (Mississauga, CA) |
Appl. No.: | 273462 |
Filed: | March 22, 1999 |
Current U.S. Class: | 342/22; 342/175; 342/198 |
Intern'l Class: | G01V 003/12 |
Field of Search: | 342/22,190,191,175,198,203 |
5327139 | Jul., 1994 | Johnson | 342/22. |
5357253 | Oct., 1994 | Van Etten et al. | 342/22. |
5650670 | Jul., 1997 | Thaxter | 307/106. |
5680048 | Oct., 1997 | Wollny | 324/329. |
5837926 | Nov., 1998 | Franklin | 102/427. |
5952561 | Sep., 1999 | Jaselskis et al. | 73/78. |
5952954 | Sep., 1999 | Beckner | 342/22. |
5969661 | Oct., 1999 | Benjamin | 342/22. |
Foreign Patent Documents | |||
2266222A1 | Sep., 1999 | CA | . |
2266214A1 | Sep., 1999 | CA | . |
2234597A1 | Sep., 1999 | CA | . |
9963361A1 | Sep., 1999 | WO | . |